AoT will continue to twist the knife in on your theories guys. Simply because there so much we don't know despite the long run the manga has. I leave you with this, when something surprising is revealed, look back on some episodes and you see that the clue was in front of you all this time.

BTW Have you guys checked out RWBY from Roosterteeth? It a 3D cartoon that is very anime style.

If you're talking about that episode with Reiner, then i can say that was just blood from the Titan and not a real hint. It's more clear in the manga what happen did. I mean the second ending has way more spoilers.

Also yeah, guessing sucks in this series because 90% you're probably gonna be wrong.